From my research the answer for this question is 5
Answer:

Step-by-step explanation:
Salvage value=$1000
Purchased value=$11,000
In order to find the balance in accumulated depreciation at december 31,2015 using the units of activity we will use the following formula:

In the above equation $10000 came from Purchased value - salvage Value
So we basically need to find 35% of 20. An easy way to find percents is to multiply by the decimal form of said percent. So, .35 x 20 = 7.
Brea will hit the ball approximately 7 times when she is at bat.
Is there a picture or something to help me understand you're question??
Answer:
Linda makes 3 more cards than Paul.
Step-by-step explanation:
Let's express the affirmations into equations:
Paul (P) can make 1 card for every 3 cards Linda (L) makes:
(1)
Linda can make 3 cards for every 2 cards that Aaron (A) makes:
(2)
During a week, Aaron makes 72 cards, hence the number of cards of Linda and Paul can be calculated as follows:
From equation (2):

Now, from equation (1):

Finally, the number of cards that Linda makes more than Paul is:

Therefore, Linda makes 3 more cards than Paul.
I hope it helps you!